Kururi Line (converted to 1,067 mm (3 ft 6 in) gauge) (operating)
Nagareyama Line (converted to 1,067 mm (3 ft 6 in) gauge) (operating)
Ōigawa Railway Ikawa Line (dual gauge lines with 1,067 mm (3 ft 6 in) gauge track previously present) (converted to 1,067 mm (3 ft 6 in) gauge) (operating)